/// <summary>
/// 旋转矩阵，逆时针旋转angle
/// </summary>
/// <param name="angle">旋转角度</param>
/// <returns></returns>
public static Matrix2x2 RotateMatrix(double angle)
{
double cosAngle = MathFunc.cosAngle(angle);
double sinAngle = MathFunc.sinAngle(angle);
Double2 col1 = new Double2(cosAngle, sinAngle);
Double2 col2 = new Double2(-sinAngle, cosAngle);
return(new Matrix2x2(col1, col2));
}
/// <summary>
/// 求角度
/// </summary>
/// <returns></returns>
public double GetAngle()
{
double len = magnitude;
if (len == 0)
{
return(0);
}
double sinValue = this.y / len;
double cosValue = this.x / len;
return(MathFunc.GetAngle(cosValue, sinValue));
}
/// <summary>
/// 指数函数
/// </summary>
/// <param name="n"></param>
/// <returns></returns>
public Complex Exp(double n)
{
double len = this.magnitude;
double angle = this.GetAngle();
if (len == 0)
{
return(zero);
}
len = System.Math.Pow(len, n);
angle *= n;
return(new Complex(len * MathFunc.cosAngle(angle), len * MathFunc.sinAngle(angle)));
}